Pompeo fieri



No. 623,424. Patented Apr. l8, I899.

. P. PIERI.

PADDLE WHEEL.

(Application filed Oct. 15, 1898.) (No Model.)

g Q Rm beo Paera Un'rrnn Sterne Parana Prion.

POMPEO PIERI, OF PARIS, FRANCE.

PADDLE-WHEEL.

SPECIFICATION forming part 'of' Letters Patent No. 623,424, dated April18, 1899.

Application filecl octo'ber 15, 1898. Serial No. 693,678. (No model.)

To all whom, it may concern:

Be it known that I, POMPEO PIERI, a subject of the King of Italy,permanentlyresiding at Paris, France, and tem porarily residing in thecity, county, and State of New York, have invented certain new anduseful Improvements in Paddle-Wheels, of which the following is a full,clear, and exact specification. My invention relates to paddle-wheelsfor steamboats and the like; and the object of the invention is toprovide a paddle-wheel that is less liable to be damaged than theordinary paddle-wheel and will when in motion increase the speed of theboat to which it is secured.

Myinvention relates also to the particular arrangement of my improvedpaddle-wheel, to be hereinafter fully described.

In constructing the paddle wheel I make that portion to which thepaddle-wheel blades are fastened of large diameter in order thatstrength of action upon the water may be obtained. I provide three setsof paddle-wheel blades, consisting of six blades, and arrange themalternately on both sides of the wheel. The blades on the inner side arespoon or oar shaped, while the blades on the outside of the wheel are soformed that they will incline to the center of the paddle-wheel. Bythisconstruction I am enabled to cause a saving of fuel in that a lesserpower is required to drive the paddle-wheel than is required with theordinary wheel. The object of' inclining the outer paddle-wheel bladesis to have them take up and throw aside the water cast up by the bladeson the inner side of the wheel.

It has also been the usual practice heretofore to provide ships withpaddle-wheels at theirstern; but in my construction I provide a set ofpaddle-wheels at each side of both the stern and the prow, which receivetheir power from the engine in the usual manner.

Referring to the drawings forming part of this application, in whichsimilar letters of reference indicate similar parts throughout, Figure 1represents a portion of a ship provided with myimproved paddle-wheels.Fig.

2 represents the paddle-wheel; and Fig. 3 is a sectional view of thepaddle-wheel, taken on line a at of Fig. 2.

In securing the inner and outer paddlewheel blades A and X,respectively, to the wheel B any desired or suitable means may beemployed. It is usual to use ordinary bolts or studs with nuts at theends to prevent them slipping out. In the drawings I have shown thestuds at d.

The paddle-wheels at the stern are secured to a common axis at D, aboutwhich they revolve and at such distance from the body of the ship as toprevent the blades from coming into contact therewith. .At the prow ofthe ship the paddle-wheel blades are similarly secured to a common axis,about which they revolve; but the entire paddle-wheel is secured to thebody of the ship proper by means of the axis, which penetrates and runsentirely through the prow. The paddle-Wheels at both stern and prow maybe driven by an engine situated at or about the center of the ship,furnishing power to them, or a separate power-engine may be employed foreach paddle-wheel,or I may use any other motive power giving the desiredresult.

I may of course use any number of paddlewheels of any suitable sizearranged at any desired plan; but I prefer to arrange them as abovedescribed, at the prow and at the stern.

The blades have a straight leading edge extending radially orsubstantially so, while the rear edges of the blades are curved, and therear portions of the blades are curved to the front, forming spoon-likeor concaved surfaces. By reason of the spoon-like or concaved surfacesthe front blade of each pair will throw or turn the water laterallyinto'the path of the spoon-like or concaved surface on the second bladeof this pair. The propeller may be used as a paddle-wheel, in which casethe upper part thereof would be out of the water and the straight edgewould be the leading edge, which would cut the water when it reaches ahorizontal position, or the line 4 4 in Fig. 2.

Having described my invention, what I claim, and desire to secure byLetters Patent, larly bent with their concave faces on the :o is sameside substantially as described.

In combination in a paddle-Wheel, the two In witness whereof I havehereunto set myblades, one beingarrangedin rear of the other, hand inpresence of two Witnesses. both blades havin strai ht leadin ed es andcurved rear edges with the ooncav e or spoon- PQMPEO PIERI' like face,said ooncaved surfaces being formed Vitnesses: by bending the rearcurved and upper parts GEORGE GUSTAV SCHOENLANK, 0f the bladeslaterally, both blades being simi- OTTO -MUND.

